The Kohn-Laplace equation on abstract CR manifolds: Global regularity
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- by Tran Vu Khanh and Andrew Raich PDF
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Abstract:
Let $M$ be a compact, pseudoconvex-oriented, $(2n+1)$-dimensional, abstract CR manifold of hypersurface type, $n\geq 2$. We prove the following:
(i) If $M$ admits a strictly CR-plurisubharmonic function on $(0,q_0)$-forms, then the complex Green operator $G_q$ exists and is continuous on $L^2_{0,q}(M)$ for degrees $q_0\le q\le n-q_0$. In the case that $q_0=1$, we also establish continuity for $G_0$ and $G_n$. Additionally, the $\bar {\partial }_{b}$-equation on $M$ can be solved in $C^\infty (M)$.
(ii) If $M$ satisfies “a weak compactness property” on $(0,q_0)$-forms, then $G_q$ is a continuous operator on $H^s_{0,q}(M)$ and is therefore globally regular on $M$ for degrees $q_0\le q\le n-q_0$; and also for the top degrees $q=0$ and $q=n$ in the case $q_0=1$.
We also introduce the notion of a “plurisubharmonic CR manifold” and show that it generalizes the notion of “plurisubharmonic defining function” for a domain in $\mathbb {C}^N$ and implies that $M$ satisfies the weak compactness property.
References
- Luca Baracco, The range of the tangential Cauchy-Riemann system to a CR embedded manifold, Invent. Math. 190 (2012), no. 2, 505–510. MR 2981820, DOI 10.1007/s00222-012-0387-2
- Albert Boggess, CR manifolds and the tangential Cauchy-Riemann complex, Studies in Advanced Mathematics, CRC Press, Boca Raton, FL, 1991. MR 1211412
- Luca Baracco, Stefano Pinton, and Giuseppe Zampieri, Hypoellipticity of the Kohn-Laplacian $\square _b$ and of the $\overline \partial$-Neumann problem by means of subelliptic multipliers, Math. Ann. 362 (2015), no. 3-4, 887–901. MR 3368086, DOI 10.1007/s00208-014-1144-1
- Harold P. Boas and Mei-Chi Shaw, Sobolev estimates for the Lewy operator on weakly pseudoconvex boundaries, Math. Ann. 274 (1986), no. 2, 221–231. MR 838466, DOI 10.1007/BF01457071
- Harold P. Boas and Emil J. Straube, Sobolev estimates for the complex Green operator on a class of weakly pseudoconvex boundaries, Comm. Partial Differential Equations 16 (1991), no. 10, 1573–1582. MR 1133741, DOI 10.1080/03605309108820813
- Harold P. Boas and Emil J. Straube, de Rham cohomology of manifolds containing the points of infinite type, and Sobolev estimates for the $\overline \partial$-Neumann problem, J. Geom. Anal. 3 (1993), no. 3, 225–235. MR 1225296, DOI 10.1007/BF02921391
- Harold P. Boas and Emil J. Straube, Global regularity of the $\overline \partial$-Neumann problem: a survey of the $L^2$-Sobolev theory, Several complex variables (Berkeley, CA, 1995–1996) Math. Sci. Res. Inst. Publ., vol. 37, Cambridge Univ. Press, Cambridge, 1999, pp. 79–111. MR 1748601
- Séverine Biard and Emil J. Straube, $L^2$-Sobolev theory for the complex Green operator, Internat. J. Math. 28 (2017), no. 9, 1740006, 31. MR 3690415, DOI 10.1142/S0129167X17400067
- So-Chin Chen and Mei-Chi Shaw, Partial differential equations in several complex variables, AMS/IP Studies in Advanced Mathematics, vol. 19, American Mathematical Society, Providence, RI; International Press, Boston, MA, 2001. MR 1800297, DOI 10.1090/amsip/019
- Hans Grauert, Bemerkenswerte pseudokonvexe Mannigfaltigkeiten, Math. Z. 81 (1963), 377–391 (German). MR 168798, DOI 10.1007/BF01111528
- Phillip S. Harrington, Global regularity for the $\overline \partial$-Neumann operator and bounded plurisubharmonic exhaustion functions, Adv. Math. 228 (2011), no. 4, 2522–2551. MR 2836129, DOI 10.1016/j.aim.2011.07.008
- Lars Hörmander, $L^{2}$ estimates and existence theorems for the $\bar \partial$ operator, Acta Math. 113 (1965), 89–152. MR 179443, DOI 10.1007/BF02391775
- Phillip S. Harrington and Andrew Raich, Regularity results for $\overline \partial _b$ on CR-manifolds of hypersurface type, Comm. Partial Differential Equations 36 (2011), no. 1, 134–161. MR 2763350, DOI 10.1080/03605302.2010.498855
- Phillip S. Harrington and Andrew S. Raich, Closed range for $\overline \partial$ and $\overline \partial _b$ on bounded hypersurfaces in Stein manifolds, Ann. Inst. Fourier (Grenoble) 65 (2015), no. 4, 1711–1754 (English, with English and French summaries). MR 3449195, DOI 10.5802/aif.2972
- T. V. Khanh, The Kohn-Laplace equation on abstract CR manifolds: Local regularity, submitted.
- Tran Vu Khanh, Equivalence of estimates on a domain and its boundary, Vietnam J. Math. 44 (2016), no. 1, 29–48. MR 3470751, DOI 10.1007/s10013-015-0160-0
- J. J. Kohn, Global regularity for $\bar \partial$ on weakly pseudo-convex manifolds, Trans. Amer. Math. Soc. 181 (1973), 273–292. MR 344703, DOI 10.1090/S0002-9947-1973-0344703-4
- J. J. Kohn, Estimates for $\bar \partial _b$ on pseudoconvex CR manifolds, Pseudodifferential operators and applications (Notre Dame, Ind., 1984) Proc. Sympos. Pure Math., vol. 43, Amer. Math. Soc., Providence, RI, 1985, pp. 207–217. MR 812292, DOI 10.1090/pspum/043/812292
- J. J. Kohn, The range of the tangential Cauchy-Riemann operator, Duke Math. J. 53 (1986), no. 2, 525–545. MR 850548, DOI 10.1215/S0012-7094-86-05330-5
- J. J. Kohn, Hypoellipticity at points of infinite type, Analysis, geometry, number theory: the mathematics of Leon Ehrenpreis (Philadelphia, PA, 1998) Contemp. Math., vol. 251, Amer. Math. Soc., Providence, RI, 2000, pp. 393–398. MR 1771281, DOI 10.1090/conm/251/03882
- J. J. Kohn, Superlogarithmic estimates on pseudoconvex domains and CR manifolds, Ann. of Math. (2) 156 (2002), no. 1, 213–248. MR 1935846, DOI 10.2307/3597189
- Tran Vu Khanh, Stefano Pinton, and Giuseppe Zampieri, Compactness estimates for $\square _{b}$ on a CR manifold, Proc. Amer. Math. Soc. 140 (2012), no. 9, 3229–3236. MR 2917095, DOI 10.1090/S0002-9939-2012-11190-6
- Tran Vu Khanh and G. Zampieri, Estimates for regularity of the tangential $\overline {\partial }$-system, Math. Nachr. 284 (2011), no. 17-18, 2212–2224. MR 2859760, DOI 10.1002/mana.200910279
- Samangi Munasinghe and Emil J. Straube, Geometric sufficient conditions for compactness of the complex Green operator, J. Geom. Anal. 22 (2012), no. 4, 1007–1026. MR 2965360, DOI 10.1007/s12220-011-9226-8
- Andreea C. Nicoara, Global regularity for $\overline \partial _b$ on weakly pseudoconvex CR manifolds, Adv. Math. 199 (2006), no. 2, 356–447. MR 2189215, DOI 10.1016/j.aim.2004.12.006
- Stefano Pinton and Giuseppe Zampieri, The Diederich-Fornaess index and the global regularity of the $\bar \partial$-Neumann problem, Math. Z. 276 (2014), no. 1-2, 93–113. MR 3150194, DOI 10.1007/s00209-013-1188-z
- Andrew Raich, Compactness of the complex Green operator on CR-manifolds of hypersurface type, Math. Ann. 348 (2010), no. 1, 81–117. MR 2657435, DOI 10.1007/s00208-009-0470-1
- Andrew S. Raich and Emil J. Straube, Compactness of the complex Green operator, Math. Res. Lett. 15 (2008), no. 4, 761–778. MR 2424911, DOI 10.4310/MRL.2008.v15.n4.a13
- Mei-Chi Shaw, $L^2$-estimates and existence theorems for the tangential Cauchy-Riemann complex, Invent. Math. 82 (1985), no. 1, 133–150. MR 808113, DOI 10.1007/BF01394783
- Emil J. Straube, A sufficient condition for global regularity of the $\overline \partial$-Neumann operator, Adv. Math. 217 (2008), no. 3, 1072–1095. MR 2383895, DOI 10.1016/j.aim.2007.08.003
- Emil J. Straube, Lectures on the $\scr L^2$-Sobolev theory of the $\overline {\partial }$-Neumann problem, ESI Lectures in Mathematics and Physics, European Mathematical Society (EMS), Zürich, 2010. MR 2603659, DOI 10.4171/076
- Emil J. Straube, The complex Green operator on CR-submanifolds of ${\Bbb C}^n$ of hypersurface type: compactness, Trans. Amer. Math. Soc. 364 (2012), no. 8, 4107–4125. MR 2912447, DOI 10.1090/S0002-9947-2012-05510-3
- Emil J. Straube and Yunus E. Zeytuncu, Sobolev estimates for the complex Green operator on CR submanifolds of hypersurface type, Invent. Math. 201 (2015), no. 3, 1073–1095. MR 3385640, DOI 10.1007/s00222-014-0564-6
Additional Information
- Tran Vu Khanh
- Affiliation: School of Mathematics and Applied Statistics, University of Wollongong, New South Wales 2522, Australia
- Address at time of publication: School of Engineering, Tan Tao University, Long An, Vietnam
- MR Author ID: 815734
- Email: tkhanh@uow.edu.au, khanh.tran@ttu.edu.vn
- Andrew Raich
- Affiliation: Department of Mathematical Sciences, SCEN 327, 1 University of Arkansas, Fayetteville, Arkansas 72701
- MR Author ID: 634382
- ORCID: 0000-0002-3331-9697
- Email: araich@uark.edu
- Received by editor(s): March 29, 2017
- Received by editor(s) in revised form: October 27, 2017, August 3, 2018, December 4, 2018, and March 25, 2019
- Published electronically: August 28, 2020
- Additional Notes: The first author was supported by ARC grant DE160100173 and NAFOSTED grant 101.02-2019.319
The second author was partially supported by NSF grant DMS-1405100. - © Copyright 2020 American Mathematical Society
- Journal: Trans. Amer. Math. Soc. 373 (2020), 7575-7606
- MSC (2010): Primary 32V20, 32V35, 32W10; Secondary 35N15, 32U05
- DOI: https://doi.org/10.1090/tran/8206
- MathSciNet review: 4169668